Caladenia rigida (Caladenia rigida)
Description
Caladenia rigida is a terrestrial, perennial, deciduous, herb with an underground tuber and a single hairy leaf 80–200 mm (3–8 in) long and 8–10 mm (0.3–0.4 in) wide. One or two white flowers with fine reddish-brown lines and 40–60 mm (1.6–2.4 in) across are borne on a spike 150–300 mm (6–10 in) tall. The sepals, but not the petals, have red, reddish-black or yellow-green glandular tips 8–12 mm (0.3–0.5 in) long. The dorsal sepal is erect near its base then gently curves forward and is 25–45 mm (1–2 in) long and about3 mm (0.1 in) wide. The lateral sepals are 40–50 mm (1.6–2.0 in) long and 4–7 mm (0.2–0.3 in) wide and spread stiffly apart. The petals are 25–37 mm (0.98–1.5 in) long, 3–5 mm (0.1–0.2 in) wide and arranged like the lateral sepals. The labellum is 14–16 mm (0.55–0.63 in) long and 9–11 mm (0.35–0.43 in) wide, and white. The sides of the labellum have many red, linear teeth up to 1.5 mm (0.06 in) long with white tips, and the tip of the labellum curves downwards. There are four or six rows of red calli with white tips along the labellum mid-line. Flowering occurs from August to October.
Taxonomic tree
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Domain: Eukarya
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Kingdom: Plantae
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Phylum:
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Class: Liliopsida
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Order: Asparagales
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Family: Orchidaceae
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Genus: Caladenia
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